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$119+ Cheap flights from LaGuardia, NY (LGA) to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
LGA — ONT
Aug 16 — Aug 231
Sat 8/16
Sat 8/23
1 adult, Economy
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Cheap flight deals from LaGuardia to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from LaGuardia (LGA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 11, 2025.

Round-trip from

$239
(CheapOair)

One-way from

$119
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$308
From New York LaGuardia to Ontario
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One-way flight from New York LaGuardia to Ontario
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Highest demand for flights based on searches. 9% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from LaGuardia to Ontario

Cheapest flights from LaGuardia to Ontario
Explore the most affordable flight options available from LaGuardia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 11, 2025.

This Booking.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1810:55 pmLGA - ONT
1 stop27h 55mFrontier
Tue 9/212:59 amONT - LGA
1 stop18h 06mFrontier
Deal found 8/9$235
This CheapOair deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1710:56 pmLGA - ONT
1 stop11h 27mFrontier
Tue 9/238:59 pmONT - LGA
1 stop22h 12mFrontier
Deal found 8/10$239
This Mytrip deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/810:56 pmLGA - ONT
1 stop23h 58mFrontier
Tue 9/168:59 pmONT - LGA
1 stop22h 12mFrontier
Deal found 8/11$240
This Mytrip deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2010:50 pmLGA - ONT
1 stop28h 00mFrontier
Fri 8/2212:59 amONT - LGA
1 stop18h 06mFrontier
Deal found 8/9$241
This Booking.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:56 pmLGA - ONT
1 stop23h 58mFrontier
Tue 9/238:59 pmONT - LGA
1 stop22h 12mFrontier
Deal found 8/8$245
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/213:40 pmLGA - ONT
1 stop9h 50mSouthwest
Tue 8/2612:20 pmONT - LGA
1 stop8h 05mSouthwest
Deal found 8/10$247
This Mytrip deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/810:56 pmLGA - ONT
1 stop23h 58mFrontier
Wed 9/108:59 pmONT - LGA
1 stop22h 12mFrontier
Deal found 8/9$248
This Mytrip deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1810:55 pmLGA - ONT
1 stop27h 55mFrontier
Fri 8/2212:59 amONT - LGA
1 stop18h 06mFrontier
Deal found 8/9$250
This Mytrip deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/610:56 pmLGA - ONT
1 stop11h 27mFrontier
Sun 9/78:59 pmONT - LGA
1 stop22h 12mFrontier
Deal found 8/9$251
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/214:59 pmLGA - ONT
1 stop8h 15mAmerican Airlines
Thu 9/410:53 amONT - LGA
2 stops9h 52mAmerican Airlines
Deal found 8/10$252
This CheapOair deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2110:50 pmLGA - ONT
1 stop28h 00mFrontier
Wed 9/312:59 amONT - LGA
1 stop18h 12mFrontier
Deal found 8/9$253

Cheapflights Fare Finder

 
Customize your flight search to find flights from LaGuardia to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 11, 2025.
Use the filters below to find and compare flights from New York LaGuardia Airport to Ontario that are best for you.

Fly from

LaGuardia

Fly to

Ontario

Route

Depart

Return

Price

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 9/17

10:56 pm-7:23 am

1 stop11h 27m

Ontario

Tue 9/23

8:59 pm-10:11 pm

1 stop22h 12m

$239

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Mon 9/8

10:56 pm-7:54 pm

1 stop23h 58m

Ontario

Tue 9/16

8:59 pm-10:11 pm

1 stop22h 12m

$240

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 9/18

10:56 pm-7:54 pm

1 stop23h 58m

Ontario

Tue 9/23

8:59 pm-10:11 pm

1 stop22h 12m

$245

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 8/21

3:40 pm-10:30 pm

1 stop9h 50m

Ontario

Tue 8/26

12:20 pm-11:25 pm

1 stop8h 05m

$247

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Mon 9/8

10:56 pm-7:54 pm

1 stop23h 58m

Ontario

Wed 9/10

8:59 pm-10:11 pm

1 stop22h 12m

$248

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 10/8

10:00 pm-7:29 am

1 stop12h 29m

Ontario

Sat 10/11

7:04 am-10:00 pm

1 stop11h 56m

$250

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Sat 9/6

10:56 pm-7:23 am

1 stop11h 27m

Ontario

Sun 9/7

8:59 pm-10:11 pm

1 stop22h 12m

$251

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 8/21

4:59 pm-10:14 pm

1 stop8h 15m

Ontario

Thu 9/4

10:53 am-11:45 pm

2 stops9h 52m

$252

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 8/21

10:50 pm-11:50 pm

1 stop28h 00m

Ontario

Wed 9/3

12:59 am-10:11 pm

1 stop18h 12m

$253

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Tue 10/7

10:55 pm-11:50 pm

1 stop27h 55m

$119

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 19 results
1
2

Best time to book a flight from LaGuardia to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from LaGuardia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from New York LaGuardia Airport to Ontario

What is the cheapest month to book a flight from New York LaGuardia Airport to Ontario?

Currently, August is the cheapest month in which you can book a flight from New York LaGuardia Airport to Ontario (average of $246). Flying from New York LaGuardia Airport to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LGA to ONT?

Find hourly flight availability from LaGuardia to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 11, 2025.

When flying from New York LaGuardia Airport to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 32% versus a flight in the afternoon.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated August 11, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from New York LaGuardia Airport to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,979 reviews
Southwest
8.0
Very good
4,248 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,920 reviews
Southwest
8.0
Very good
4,248 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Frontier
5.8
Fair
3,221 reviews
Southwest
8.0
Very good
4,248 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Related info for your journey

Find useful and relevant information for your journey from LaGuardia to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from New York LaGuardia?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Ontario from New York LaGuardia. Booking flights from New York LaGuardia to Ontario (ONT) should be relatively easy as there are 0 daily inbound flights from New York LaGuardia from 5 different airlines.

  • What is the cheapest airline to fly from New York LaGuardia Airport to Ontario round-trip?

    Frontier, at $239, was found to be the cheapest airline from New York LaGuardia Airport to Ontario.. Frontier is currently priced 38% below the average price you’ll pay for this route.

  • Can I find deals for flights from LaGuardia to Ontario that include hotel bookings?

    Yes. In addition to deals on LaGuardia to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from LaGuardia to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from LaGuardia to Ontario.

  • Can I find deals for business class flights from LaGuardia to Ontario?

    Yes. Cheapflights offers flight deals from LaGuardia to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from New York LaGuardia Airport to Ontario?

    Currently, August is the cheapest month in which you can book a flight from New York LaGuardia Airport to Ontario (average of $246). Flying from New York LaGuardia Airport to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for LaGuardia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from LaGuardia to Ontario

Discover the top 5 airlines that operate flights from LaGuardia to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$153Average$300FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$214Average$631FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$266Average$396FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$444FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$286Average$447FlexibilityNo cancel feeOn-time63%

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